This week's is a collection of specialized publishers. That is, publishers who focus on a single subject or fairly tight group. They range from small presses to some decent sized ones. One example is Shambhala, a long running publisher of books on meditation and Eastern religion. There's publishers for women, health, and some very focussed fiction publishers (e.g. Dragonblade, who specialize in historical fiction with a romance angle). Obviously, this list is geared more to folks writing books but, hey, some of us are or are thinking of it.
https://authorspublish.com/61-specialized-publishers-open-to-manuscript-submissions/